bmahersciwriter writes: In one of the biggest-ever seismology deployments at an active volcano, researchers are peppering Mount St Helens in Washington state with equipment to study the intricate system of chambers and pipes that fed the most devastating eruption in US history. This month, they plan to set off 24 explosions — each equivalent to a magnitude-2 earthquake — around around the slumbering beast in an effort to map the its interior with unprecedented depth and clarity.Link to Original Source